Dental casting machine



June 27, 1933. E. H. HINRICHS 8 4 DENTAL CASTING MACHINE Filed July 18; 1952 2 Sheets-Sheet 1 Inventor rz'cs I By 6 ttorney June 27, 1933. mR c s 1,915,887

DENTAL CASTING MACHINE Filed July 18, 1932 2 Sheets-Sheet 2 Inventor f1 ltomey' Patented June 27, 1933 ERNEST H. HINRIGH'S, OF BALTIMORE, MARYLAND DENTAL oAs'rniG MACHINE Application filed July s,

This invention relates to new and useful improvements in dental casting machines of the centrifugal type'including a swinging or .4 shiftable holder for the mold or crucible and has for its primary object to provide, in a manner as hereinafter set forth, a machine of this characterembodying a novel construction, combination and arrangement of parts through the medium of which .the holder will be moved toward a position in alinement with the rotary support substantially simultaneously with the beginning of rotary movement of said support orimmediately thereafter. 'Other objects of the-invention are to provide a dental casting machine of the aforementioned character which will be simple in construction, strong, durable, highly eflicient and reliable in use, compact, light in weight,

. and which may be manufactured at low cost;

i All of the foregoing and still further ob-' jects and advantages of the invention will come apparent from a study of thefollowing specification, taken in connection-with the accompanying drawings wherein like characters of reference designate corresponding parts throughout the several views, and

wherein:

Figure 1 is a view in front elevationv of a dental casting machine constructed in accordance with the present invention.

Figure 2 is a view in vertical longitudmal section through the machine, showing same in operation.

. Figure 3 is a view in top plan of the device.

Figure 4 is a detail view in transverseseca011, taken substantially on the line 44 of Figurel.

Figure 5 is'a detail View in perspective of the rotary support.

--.Figure6 isa detail view in vertical. transverse section'taken substantially on the line 6-15 of Figure 1.

Referring now to the drawings in detail, itwill be seen that the embodiment of the invention which has been illustrated'comprises a support which is designated generally by the reference numeral 1, said support being fixed by a set screw 2 011 the shaft 3 of an electric motor 4 for rotation in a vertical plane, the support being provided with a 1932. Serial .NO. 623,245.

transverse opening at an intermediate point for the reception of the shaft 3. The electric motor 4 is provided with a supporting standard 5 but may be mounted in any other suitable manner. The support 1 which has been lllltStILt-Gd includes a bar 6 from one'end of which a pair of spaced, parallel arms 7, eX- tendproviding a fork, said arms 7 having openings 8 in their free end portionsjthe purpose of which will be presently set forth. Pro ect1ng laterally from-one of the arms 7 1s a stop 9, the purpose of which also will be presently set forth. v Mounted for swinging movement between I the arms 7 of the support 1 is mold or em clble holder which is designated generally the reference numeral 10, said holder 10 including a fiat plate 11 constituting a bottom from which spaced fingers 12 extend substantially' at rightangles. Trunnions 13 proectoutwardly .from an opposed pair of the fingers 12 and are ournaled in the openings 8 of the arms 7. A crank arm 14 extends substantially at right angles from the outer end of one of the trunnions 13 and terminates in an eye 15. i

The reference numeral 16 designates a rod wh ch is slidably mounted in a supporting guide 17 on the support land has one end pivotally connected with the eye 15 on the crank arm 14. The other end portion of the 'rodrl6 projects beyond the corresponding end of the support 1 and is threaded, as at 18, and has threadedly mounted thereon for longitudinal adjustment a counterweight 19.

The reference numeral 20 designates the' mold or cruciblein position in the holder lO. The mold or crucible 20 is provided with a" concavity 21 in its top for the reception of the molten metal 22. It will be noted that 9H0 the metal 22, by reason of the construction and .arrangement provided, is substantially in alinement with the axis upon which the holder 10 swings.

In operation, when the support 1 begins to, rotate, or immediately thereafter, the weight 19 is caused to move outwardly relative to said holder 1 by centrifugal force,

causing the holder .10 with the mold or crucible 20 therein to be swung toward a position It is believed that the many advantages'of a dental casting machine constructedin accordance with the present invention will be readily understood, and, although a pro-- ferred embodiment of the invention is as illustrated and described, it is to be understood that changes in the details of construction and in the combination'and arrangement of parts may be resorted to which will fall within the scope of the invention as claimed.

What is claimed is: I l

1. A casting machine comprising a rotary support, a holder pivotally mounted for swinging movement on the support, and means mounted on the support and operatively connected to the holder for swinging said holder on the support when said support is actuated. s v v 2. A casting machine comprising a rotary support, a holder pivotally mounted on the support, a weight shiftably mounted on the support, and means operativelyconnectmg the holder to the weightfor actuation by said weight. p 7 b 3. A casting machine comprising a rotary support, meansfor rotating the support, a holder pivotally mounted on the support on one side of the axis of rotation of said support, and means mounted on the support on the other side of the axis of rotation of said support and operatively connected to the holder for swinging said holder on the support when said support is rotated.

4:. A casting machine comprising a'rotary support, meansconnected with an intermediate portion of the support for rotating sa1d support, a holder pivotally mounted on the support on one side of the axis'of rotation of said support, and meansshiftably mounted on the support on the other side of the axis of rotation of said support'and operatively connected to the holder for'swinging said holder on the support when said support is rotated.

5. A casting machine comprising a rotary support, means connectedwith an intermediate portion of the supportltor actuating said support, a holder pivotally mounted on the support for swinging movement on one side of the axis of rotation of the support, a weight shiftably mounted on the support on the other side of the axis of rotation of said support, and means operatively connecting the holder to the weight for actuation by said Weight a 6. A casting machine comprising a rotary support, means connected with an intermediate portions of the support for actuating said support, a mold holder pivotally mounted on one endportion of the support, a weight shiftably mounted on the other end portion of the support, and means opera-tively connecting the holder to the weight for actuation by said Weight.

7. Acasting machine comprising a rotary support, means connected with an intermediate portion of the support for actuating said support,a mold holder pivotally mounted on one end portion of the support, a rod operatively connected to the mold holder and slidably'mounted on the support, said rod extending adjacent the other end of the support, anda weight mounted on the rod adjacent said otherend of the support, said weight constituting means for actuating the holder toward a position in alinement with the support when said support is rotated.

8. A casting machine comprising a rotary support, means connected with an intermediate portion of the support for rotating said support, the support including a bar and further including spaced arms projecting from one end portion of the bar, said arms having openings in their free end portions, a mold holder, trunnions mounted on the mold holder and journaledin the openings for mounting the holder for swinging movement on one end portion of the support, a crank arm extending from one of the trunnions, a guide mounted on the'other end portion of the support, a rod slidably mounted in the ly connected to the holder for swinging said holder on the support when said supportis actuated. i

In testimony whereof I aflix my signature. ERNEST H. HINRICHS. 

